George mitchell and thomas hargreaves



No Model.)

G. MITCHELL & T. HARGB-EAVES.

SPINDLE DRIVING DEVICE FOR SPINNING MACHINES.

No. 416,177. Patented Dec, 8, 1889.

276,47. F/si2.

mlilml mum 775271 455653 rven'zoz's;

UNITED STATES PATENT OFFICE- GEORGE MITCHELL AND THOMAS HARGREAVES, OFBRADFORD, COUNTY OF YORK, ENGLAND.

SPlNDLE-DRIVING DEVICE FOR SPINNING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 416,177, dated December3, 1889.

Application filed March 18, 1889. Serial No. 803,924- (No model.)Patented in England August 7, 1888, No. 11,378.

To aZZ whom it may concern I 7 Be it known that we, GEORGE MITCHELL andTHOMAS I-IARcREAvEs, subjects of the Queen of Great Britain and Ireland,re siding at Bradford, in the county of York, England, have inventedcertain new and use ful Improvements in spindle Drivin gDevices forSpinning-Machines, (for which we have obtained Letters Patent inEngland; No; 11,378, dated August 7, 1888;) and we do hereby declarethat the following is a full, clear, and exact description of theinvention, which will enable others skilled in the art to which itappertains to make and use the same.

This invention is specially applicable to slubbing and roving boxes andsimilar machines in which tension pulleys are used; and its object is todrive the spindles in such a manner that they revolve with lessvibration, at a more uniform speed, and with less tension 011 thedriving-bandsg also, to twist the fiber with greater regularity and todrive the machine with less power than hitherto.

\Ve accomplish our object in the following manner: The cylinder orpulleys on the driving-shaft of the machine is or are of the ordinarydescription. The whirls or pulleys on the spindles are each cut with.two grooves on the circumference, in which the bands are placed, oneband driving a pair of spindles. Each driving-band from the cylinder ordriving-pulley passes round a spindlewhirl twice, thus obtaining; morefrictional contact between the driving-band and whirl, at the same timetending to press the spindles toward each other, thereby steadying them.Each band after leaving the whirls passes over the cylinder or anotherpulley on the driving-shaft and over a friction or tension pulleymounted in the ordinary manner.

In order that our invention may be fully understood, we proceed todescribe it with reference to the drawings annexed, in which- Figure 1represents a transverse sectional elevation, and 2 a front view, of aportion of a slubbing o1 roving box, and Fig. a plan of a portion of amachine to which our improvements are applied.

A is the driving cylinder or pulleys.

B is the tension-pulley.

G and D are a pair of spindles, each carrying double-grooved whirls, thegrooves of which are marked E F G H. The drivingband J passes from theunder side of the driving-cylinder or pulley into the groove E of onespindle, thence round the groove G of the other spindle, thence roundthe groove of the first spindle, and thence to the groove II of theother or second spindle, thence to the upper side of a driving-pulley A,or the driving cylinder, as the case may be, and round it to thetension-pulley B, round which it passes to the driving-pulley A, or thedriving-cylinder at the starting-point.

It will be understood that the driving-pulley, cylinder, tension pulley,and doublegrooved whirls are all severally old; but our arrangement issuch as to permit of the driving-band J being passed from and to thedriving pulley or cylinder and round and round the whirls of thespindles as often as may be desired; hence the whirls may with the samearrangement be treble or 1nultiple grooved in cases where moredrivingfriction is required; but we have found that with double groovedwhirls arranged as shown the frictional contact is so much increased andthe retarding friction so much diminished that a machine containingfifteen pairs of spindles may be easily turned by hand. By obtaining theincreased frictional contact, as described, the spindles'are run at amore uniform rate, thereby twisting the fiber with greater regularityand at the same time requiring less tension on the band, so that theweight W on the tension-pulley-frame arm does not require to be so heavyor the ordinary weight have to be placed so far from the fulcrum-shaft Sas when the driving-bands pass round the whirls in the ordinary manner.

Vhat we claim is 1. The combination, with the driving cylinder orpulleys A, spindles each having a whirl with two or more grooves outtherein, and the ten sion-pulley, of the driving-band. J, passing aroundthe groove E in one whirl, thence round groove G of the other whirl,back to another groove in the first whirl, thence to another groove inthe second whirl, thence over the cylinder or a driving -pulley A,pulleys A, substantially as and for the puraround tension-pulley B, tothe starting-point, pose described. substantially as and forthe purposedescribed. In testimony whereof we have signed our 2. The combination ofthe driving cylinder names to this specification in the presence of 15 5or pulleys A and two spindles, each having a two subscribing witnesses.

whirl thereon cut with two or more grooves,

with the driving-band J, passing two or more GEORGE MITCHELL.

times around the whirls of both spindles in THOMAS HARGREAVES. thedifferent grooves thereof, as described, lVitnesses:

m and tension-pulley B, engaging a loop of said JNO. GILL,

band extending from the driving cylinder or M. PREST.

